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Equipment on Operating Leases (Details) - Vehicles [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Lessor, Lease, Description [Line Items]
Equipment on operating leases	$ 49,993		$ 49,993		$ 53,081
Less: accumulated depreciation	(10,635)		(10,635)		(10,989)
Equipment on operating leases, net	39,358		39,358		$ 42,092
Depreciation expense	1,800	$ 1,800	5,500	$ 5,600
GM Financial [Member]
Lessor Operating Lease Payments to be Received
2020	1,714		1,714
2021	5,548		5,548
2022	3,108		3,108
2023	865		865
2024	52		52
Thereafter	1		1
Total	$ 11,288		$ 11,288

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Amount of lease payment to be received by lessor for operating lease in remainder of current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lease payment to be received by lessor for operating lease in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's right to use underlying asset under operating lease.

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